Higher-density dyadic wavelet transform and its application
Higher-density dyadic wavelet transform and its application
复制标题
高密度二进小波变换及其应用
DOI:
10.1016/j.ymssp.2009.10.017
复制
发表时间:
2010-04
影响因子:
8.4
通讯作者:
Wang, Jiaxu
中科院分区:
文献类型:
--
作者:
Qin, Yi;Tang, Baoping;Wang, Jiaxu
This paper proposes a higher-density dyadic wavelet transform with two generators, whose corresponding wavelet filters are band-pass and high-pass. The wavelet coefficients at each scale in this case have the same length as the signal. This leads to a new redundant dyadic wavelet transform, which is strictly shift invariant and further increases the sampling in the time dimension. We describe the definition of higher-density dyadic wavelet transform, and discuss the condition of perfect reconstruction of the signal from its wavelet coefficients. The fast implementation algorithm for the proposed transform is given as well. Compared with the higher-density discrete wavelet transform, the proposed transform is shift invariant. Applications into signal denoising indicate that the proposed wavelet transform has better denoising performance than other commonly used wavelet transforms. In the end, various typical wavelet transforms are applied to analyze the vibration signals of two faulty roller bearings, the results show that the proposed wavelet transform can more effectively extract the fault characteristics of the roller bearings than the other wavelet transforms.
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DOI:
10.1007/978-94-015-9715-9_2
发表时间:
2001
期刊:
--
影响因子:
--
作者:
I. Selesnick
通讯作者:
I. Selesnick
影响因子:
2.5
作者:
B. Han;Qun Mo
通讯作者:
B. Han;Qun Mo
DOI:
10.1063/1.4823127
发表时间:
1992-05
期刊:
Computers in Physics
影响因子:
--
作者:
I. Daubechies
通讯作者:
I. Daubechies
DOI:
10.1006/acha.2000.0301
发表时间:
2000
期刊:
--
影响因子:
--
作者:
C. Chui;Wenjie He
通讯作者:
C. Chui;Wenjie He
影响因子:
8.4
作者:
Yi Qin;S. Qin;Yongfang Mao
通讯作者:
Yi Qin;S. Qin;Yongfang Mao